The International Lunar Network or ILN is a proposed network of a series of landed stations of the United States and the other space-faring countries on the lunar surface in the 2010s. Each of these stations will act as a node in a lunar geophysical network. Ultimately this network could comprise 8-10 or more nodes operating simultaneously. In the ILN concept, each node will have a minimum of two core capabilities. These capabilities include seismic sensing, heat flow sensing, and laser retroreflectors, and will be specific to each station. Because some nodes are planned to be located on the far side of the Moon, NASA will study a lunar communications relay satellite capability as a part of its contribution to this project. Individual nodes launched by different space agencies can and like